What is the general decibel level of motorcycles?

[SadieAnn]

For accelerating driving noise, the noise limit for two-wheeled motorcycles with engine displacement greater than 50ml and less than or equal to 80ml is 75dB (decibels). For two-wheeled motorcycles with engine displacement greater than 80ml and less than or equal to 175ml, the noise limit is 77dB. For motorcycles above 175ml and three-wheeled motorcycles, the noise limit is 80dB. Relevant regulations on noise: 40 to 60 decibels inside the vehicle is considered normal conversation level. The noise level inside passenger vehicles should not exceed 82 decibels; the noise level near the driver's ear should not exceed 90 decibels. If the interior noise is below 60 decibels, it is generally considered acceptable. Vehicle noise is divided into interior noise and exterior noise. The former affects the comfort of occupants, while the latter causes noise pollution to the outside environment. Sources of vehicle noise include engine noise, wind resistance noise, air conditioning noise, tire noise, transmission system vibration, body twisting and vibration, braking noise, etc. Classification of noise: Based on the nature of noise generation, engine noise can be divided into combustion noise, mechanical noise, and aerodynamic noise.